• synonyms


[uhn-kuh n-fawr-muh-buh l]
See more synonyms for unconformable on Thesaurus.com
  1. not conformable; not conforming.
  2. Geology. indicating discontinuity of any type in a stratigraphic sequence.
Show More

Origin of unconformable

First recorded in 1585–95; un-1 + conformable
Related formsun·con·form·a·bil·i·ty, nounun·con·form·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for unconformable

Historical Examples

  • Strata are said to be unconformable when they do not lie in regular, parallel sequence.

    Zion National Park


  • The Magdala group is unconformable to that of Ashangi in some places.

  • Massive conglomerates occur in these series, which are unconformable on the Dalradian rocks of Connemara.

  • These, it will be seen, are horizontal, and lie in what is termed "unconformable stratification" on the more ancient series.

  • Although usually conformable to the oolite, it is sometimes, as in the Jura, unconformable.

British Dictionary definitions for unconformable


  1. not conformable or conforming
  2. (of rock strata) consisting of a series of younger strata that do not succeed the underlying older rocks in age or in parallel position, as a result of a long period of erosion or nondeposition
Show More
Derived Formsunconformability or unconformableness, noununconformably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012